Join Date: Jun 2009
Location: Wilmington, NC, USA
Re: Thoughts on LED driving lights
The Osram 65W rallye bulb (try Candlepower to get one) is the easiest hi beam upgrade witrh no downside to it. 40% more light.
Can also be used in the lows to good effect but you will get even more if you convert the lows to HID. Best current kit is the one from 1offmotorsport that is also sold by some of the bigger BMW dealers.
That leaves what to do for a driving lights and then there are many option.
I chose VisionX Solstice 120 with 20 degree beam. 900 lumens, very small, on EzyMounts under the oil cooler- they fill in on the HID low and add light to the sides a bit.
DenaliD2 from Twisted Throttle are essentially identical but neither are like the D2 you referenced.
I also use Hella FF50s with the 65W Osram bulb on BMR mounts under the mirrors. Tremendous reach in a small package due to superior reflector design.
I do not get the expensive multiple LED lights. The best designs use multiple "10W" LEDs but cost all out proportion to what they are capable of doing. Plus they have extreme glare for oncoming trafific- the leneses are basically a flashlight design with no horizontal cutoff. A basic problem with high output LEDs is the need for thermal prote ction of the LEDs. This means heavy metal heat sinks, diimmers, PWM reulated power boards in the housing that can fail, etc etc. Although I have built custom LED lights for years I still don't consider them evolved enough to be ready for prime time as main lighting though they make superb conspicuity lights.
A GS can usefully carry a pair of larger HID driving lights for long range but I've not seen a first class small set that really matches an RT, yet. The small HIDs from TrailTEch, PIAA, Warn, etc are not well made and are both unreliable and poor output for an HID
Last edited by racer7; Nov 20th, 2011 at 7:17 am.